Shared Flashcard Set

Details

Volcanos
All infromation about Volcanos. Test date: 1/24/07
32
Science
8th Grade
12/21/2006

Additional Science Flashcards

 


 

Cards

Term
Volcano
Definition
a mountain that forms when magama is forced to the earths surface
Term
Lava
Definition
magma that flows onto the earths surface
Term
Lava flow
Definition
rivers of Lava that come from non-explosive volcano erruptions
Term
Explosive Erruptions
Definition
Cloudes of hot debris that shoot out of a volcano sometimes at supersonic speeds!
-No Lava, but millions of chuncks of magma that harden in the air
-dust sized particles that can circle the globe for years!
-May cause volcano to sink and be smaller in size
Term
Magma Chamber
Definition
A reservoir of moulton rock (magma) below the earth's surface, it's connected to the surface by a vent.
Term
Vent
Definition
the opening of an eaths surface through which volcanic material comes out of.
Term
Pyroctastic Material
Definition
Consists of rock fragments, comes from explosive erruptions
Term
Lava
Definition
Ranges from thick to thin
Term
Blocky Lava
Definition
Cool stiff lava that can't travel far from its sorce. So thick that it can barley move accross the ground
Term
Pahoehoe
Definition
Flows slowly, like wax dripping from a candle. Forms a glassy sruface with rounded wrinkles.
Term
Aa
Definition
A hawiian word reffering to a type of lava with a jagged crusty surface
Term
Pillow Lava
Definition
Forms when lava errupts under water. Forms round lumps that looks like pillows.
Term
Volcanic Block
Definition
the largest piece of pyroclastic material.Solid rock.
Term
Volcanic Bomb
Definition
Large blobs of magma that hardens in the air
Term
Lapilli
Definition
means "little stones" in Latin. Little bits of hardened magma.
Term
Volcanic ash forms...
Definition
the gasses in stiff magma
Term
Volcanic ash flows and fallout
Definition
clouds of ash flow down a hill at tremendous speeds
Term
Sheild Volcano
Definition
Built from layers of lava repeated non-explosive erruptions. Has Non-Explosive erruptions. Can be enormous [image]
Term
Mauna Kea
Definition
The worlds largest mountian and volcano, it's a shield volcano
Term
Cinder Cone Volcano
Definition
Smaller colcanoes only made out of pyroclastic material. Has explosive erruptions. [image]
Term
Composite or Strata Volcano
Definition
The most commen type of volcano, has both explosive and non-explosive erruptions. [image]
Term
Craters
Definition
A funnle shaped pit at the top of the central vent
Term
Caldera
Definition
a large landform on the top of a volcano formed from cool lava.
Term
Lava Plateaus
Definition
result from tremendous amount of lava errupting from fissures.
Term
Magma Formation
Definition
the tempature in the mantle is constant, the rock is hot but technically not a liquid. This is due to alot of pressure, with this, magma forms.
Term
Ring of Fire
Definition
most volcanos occur at tectonic plate boundries, the ring of fire has alot of volcanos.
Term
Volcanos at Divergent Boundries
Definition
A rift that forms in an area where plates are seperated, presure is released and magma comes out, forming a volcano.
Term
Volcanos at convergent boundres
Definition
the plates squeeze togeather forming a volcano.
Term
Extinct Volcanos
Definition
Volcanos that have not errupted in history and probobly will not errupt
Term
Dormant Volcanos
Definition
Volcanos that are not currently errupting but have in some time in recorded history.
Term
Active Volcanos
Definition
Volcanos that are in the prosess of errupting or showing signs of it.
Term
Slope
Definition
Bulges in the volcanos slope may form as magma putshes agents it inside the volcano.
Supporting users have an ad free experience!